Provided by: systemtap-doc_2.9-2ubuntu2_all 

NAME
probe::nfsd.open - NFS server opening a file for client
SYNOPSIS
nfsd.open
VALUES
type type of file (regular file or dir) client_ip the ip address of client fh file handle (the first part is the length of the file handle) access indicates the type of open (read/write/commit/readdir...)
SEE ALSO
tapset::nfsd(3stap)